Revert "Camera: Propagate power mode selection from UI to lower layers."

This reverts commit 5302d2e099de0ae1c3cb4a9cda993fe28b0e8c46, runtime
power-mode changes are causing stability issues in camcorder
Merge pull request #6 from CyanogenMod/cm-11.0

Revert "Camera: Propagate power mode selection from UI to lower layers."